package com.googlecode.flealancemarket.tapestry.services;

import java.io.IOException;




import com.googlecode.flealancemarket.core.spring.ApplicationContextProviderSingleton;
import com.googlecode.flealancemarket.core.tapestry.ApplicationContextObjectProvider;

import org.apache.tapestry.ioc.ObjectProvider;
import org.apache.tapestry.*;
import org.apache.tapestry.ioc.MappedConfiguration;
import org.apache.tapestry.ioc.OrderedConfiguration;
import org.apache.tapestry.ioc.ServiceBinder;
import org.apache.tapestry.ioc.annotations.InjectService;
import org.apache.tapestry.services.Request;
import org.apache.tapestry.services.RequestFilter;
import org.apache.tapestry.services.RequestHandler;
import org.apache.tapestry.services.Response;
import org.slf4j.Logger;
import org.springframework.context.ApplicationContext;

/**
 * This module is automatically included as part of the Tapestry IoC Registry, it's a good place to
 * configure and extend Tapestry, or to place your own service definitions.
 */
public class AppModule {
	public static void bind(ServiceBinder binder) {
		binder.bind(ObjectProvider.class, 
        		ApplicationContextObjectProvider.class)
                .withId("ApplicationContextObjectProvider");
	}

	public static void contributeApplicationDefaults(
			MappedConfiguration<String, String> configuration) {
		// Contributions to ApplicationDefaults will override any contributions
		// to
		// FactoryDefaults (with the same key). Here we're restricting the
		// supported
		// locales to just "en" (English). As you add localised message catalogs
		// and other assets,
		// you can extend this list of locales (it's a comma seperated series of
		// locale names;
		// the first locale name is the default when there's no reasonable
		// match).

		configuration.add("tapestry.supported-locales", "en,de");
		
		//configuration.add(TapestryConstants.SUPPORTED_LOCALES_SYMBOL, "en");

		// The factory default is true but during the early stages of an
		// application
		// overriding to false is a good idea. In addition, this is often
		// overridden
		// on the command line as -Dtapestry.production-mode=false
		configuration.add(TapestryConstants.PRODUCTION_MODE_SYMBOL, "false");
	}

	/**
	 * This is a service definition, the service will be named "TimingFilter".
	 * The interface, RequestFilter, is used within the RequestHandler service
	 * pipeline, which is built from the RequestHandler service configuration.
	 * Tapestry IoC is responsible for passing in an appropriate Log instance.
	 * Requests for static resources are handled at a higher level, so this
	 * filter will only be invoked for Tapestry related requests.
	 * 
	 * <p>
	 * Service builder methods are useful when the implementation is inline as
	 * an inner class (as here) or require some other kind of special
	 * initialization. In most cases, use the static bind() method instead.
	 * 
	 * <p>
	 * If this method was named "build", then the service id would be taken from
	 * the service interface and would be "RequestFilter". Since Tapestry
	 * already defines a service named "RequestFilter" we use an explicit
	 * service id that we can reference inside the contribution method.
	 */
	public RequestFilter buildTimingFilter(final Logger log) {
		return new RequestFilter() {
			public boolean service(Request request, Response response,
					RequestHandler handler) throws IOException {
				long startTime = System.currentTimeMillis();

				try {
					// The reponsibility of a filter is to invoke the
					// corresponding method
					// in the handler. When you chain multiple filters together,
					// each filter
					// received a handler that is a bridge to the next filter.

					return handler.service(request, response);
				} finally {
					long elapsed = System.currentTimeMillis() - startTime;

					log.info(String.format("Request time: %d ms", elapsed));
				}
			}
		};
	}

	/**
	 * This is a contribution to the RequestHandler service configuration. This
	 * is how we extend Tapestry using the timing filter. A common use for this
	 * kind of filter is transaction management or security.
	 */
	public void contributeRequestHandler(
			OrderedConfiguration<RequestFilter> configuration,
			@InjectService("TimingFilter")
			RequestFilter filter) {
		// Each contribution to an ordered configuration has a name, When
		// necessary, you may
		// set constraints to precisely control the invocation order of the
		// contributed filter
		// within the pipeline.

		configuration.add("Timing", filter);
	}

    public static ApplicationContext buildApplicationContext() {
    	return new ApplicationContextProviderSingleton().getContext();
    }

    /**
     * Contributes a provider named "Spring".
     */
    public static void contributeMasterObjectProvider(
    		@InjectService("ApplicationContextObjectProvider")
    		ObjectProvider applicationContextObjectProvider,
    		OrderedConfiguration<ObjectProvider> configuration) {
        configuration.add("Spring", applicationContextObjectProvider);
    }

}
